android - FCM: onNewToken vs FirebaseInstanceId

Question

Firebase has deprecated some of the messaging calls in the com.google.firebase:firebase-messaging:17.1.0 release. This post goes over those changes nicely.

Question: Can someone tell me if is it considered bad practice to not implement onNewToken and instead just call the below block each app launch This probably seems excessive to Android folks but feels like home from an iOS point of view.

FirebaseInstanceId.getInstance().instanceId.addOnSuccessListener(this) { instanceIdResult ->
    // Just use this call 
    val newToken = instanceIdResult.token
    Log.i("newToken", newToken)
}



@Override
public void onNewToken(String s) {
    super.onNewToken(s);
    // Leave this unimplemented
}

I am more familiar with iOS which calls its onNewToken equivalent on every app launch. So for iOS I put logic there to determine if my backend needs to be updated.

getInstanceId() docs say This generates an Instance ID if it does not exist yet, which starts periodically sending information to the Firebase backend. This makes me assume I can just call FirebaseInstanceId.getInstance().instanceId.addOnSuccessListener each launch.

Answer 1

Waitting for answers